Across
1
Nerve cell in the brain
4
Substance with pH below 7
5
Amplified beam of light
9
Hottest planet in solar system
11
Compound containing oxygen
Down
2
Push or pull on an object
3
Preserved remains of ancient life
6
Precious yellow metallic element
7
Substance with pH above 7
8
The Red Planet
10
Basic unit of life